What characterisics could be used to classify animals into different groups?
These characteristics could include habitat (if they live in the sea or live on land; the climate), and certain things like if they have fur or if they eat meat/plants.
There are several different groups in the hierarchy. Animals is the kingdom that all animals are a part of. From there they are categorized by phylum, class, order, family, genus, and species. Some are: 1. amphibians 2. annelids 3. arthropods 4. birds 5. echinoderms 6. fish 7. mammals 8. mollusks 9. reptiles Those are just some of the terms!